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    Influence of Cationic Surfactants on the Formation and Surface Oxidation States of Gold Nanoparticles Produced via Laser Ablation

    Access Status
    Fulltext not available
    Authors
    Fong, Yuen-Yan
    Gascooke, Jason
    Visser, Bradley
    Harris, Hugh
    Cowie, Bruce
    Thomsen, Lars
    Metha, Gregory
    Buntine, Mark
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Fong, Yuen-Yan and Gascooke, Jason and Visser, Bradley and Harris, Hugh and Cowie, Bruce and Thomsen, Lars and Metha, Gregory and Buntine, Mark. 2013. Influence of Cationic Surfactants on the Formation and Surface Oxidation States of Gold Nanoparticles Produced via Laser Ablation. Langmuir. 29: pp. 12452-12462.
    Source Title
    Langmuir
    DOI
    10.1021/la402234k
    ISSN
    0743-7463
    URI
    http://hdl.handle.net/20.500.11937/41216
    Collection
    • Curtin Research Publications
    Abstract

    We report on the time evolution of gold nanoparticles produced by laser ablation in the presence of the cationic surfactants cetyltrimethylammonium bromide (CTAB) and cetyltrimethylammonium chloride (CTAC) in aqueous solution. The broader applicability of a laser-inducednanoparticle formation kinetic model previously developed by us for the case of anionic surfactants in aqueous solution [J.Pys. Chem. C 2010, 114, 15931-15940] is shown to also apply in the presence of cationic surfactants. We explore the surface properties of the nanoparticles produced in thepresence of the cationic surfactants via synchrotron X-ray photoelectron spectroscopy (XPS). The XPS data indicate that at CTA+ concentrations approximating the aqueous criticalmicelle concentration AuIII is present on the nanoparticle surface. Such oxidation is not observed at (i) lower CTA+ concentrations, (ii) in the presence of an anionic surfactant, or (iii) in the case of pure water as a solvent.

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